Device for filing saws.



Patented June 3, |902.

J. H. L. &. G. A. W. FOLKERS.

DEVICE FOR FILING SAWS.

(Application led Feb. 13, 1902.)

No. 70|4,7oo.

(lo Model.)

UNITED 'STATES PATENT OFFICE.

JOI-IN ILL. FOLKERS AND GEORGE A. W. FOLKERS, OF OAKLAND,

' CALIFORNIA.

DEVICE FORv FILING SAWS.

SPECIFICATION forming partof Letters Patent No. 701,700, dated. June 3, 1902. Application tiled February 13, 1902. Serial No. 93,866. (N0 mlf) Be it known that we, JOHN H. L. FoLKEEs and GEORGE A. W. FOLKERS, citizens of the United States, residing in the city of Oakland, county of Alameda, State of California, have invented an Improvement in Devices for Filing Saws; and we hereby declare the following to be afull, clear, and exact description of the same;

Our invention relates to improvements in saw filing and sharpening machines ofthe type employing rotary file members.

It consists of the parts and the constructions and combinations of parts hereinafter kdescribed and claimed.

Figure 1 is a side view of our improved de-v vice for tiling saws. Fig. 2 is a sectional View taken on the line :1c of Fig.- 1. Fig. 3. is a sectional view taken on the line y y of Fig. 2.

'A represents a frame, rigidly secured, as at 2, to any suitable support and having a horizontal guide-bar 3, against which the saw et is held by any suitable means. rIhe bar 3 is providedwith a longitudinal groove 5. The bar is preferably'of a length greater than that of the saw to be sharpened in 'order to allow the filing-carriage B tooperate the entire length of the saw. The carriage B has two members 6 6', adapted to straddle the saw. The member 6 has a vertical dovetailed guide 7, fitting ,a similarly-shaped groove 8 in a plate 9. This plate in turnhas a horizontal or transverse tonguelO on its opposite side, which is held and slidable in the groove 5 of the bar 3. The carriage B'has the two alined independently-rotatable shafts ill 11, upon which are mounted the rotary iile members 12. The abrading spiral surfaces 13 of these members engage alternate teeth, as shown, and each member is adapted to sharpen the teeth skipped by the other member. The bevel of the teeth will vary according to the pitch of the surfaces 13. By causing thesevmembers to rotate in opposite directions the carriage will move from end toend of the saw, and each tooth will be successively engaged and sharpened. Therotation of these members is eff fected by.means of a sprocket-wheel 14, mounted on'the member 6 of the carriage, and by a chain or equivalent engaging this wheel and passing over'sprockets 15 on the .endsof the shafts 11 11 and thence around the sprockets 16, secured on the member 6'. The sprocket-wheel 14 is made to revolve by a crank 17 'or by any other suitable means.

In order to regulate properly the depth of the interdental cut, a screw 18 is threaded in the plate 9 and is adapted to bear on the end of the tongue 7. By adjusting this screw the carriage is moved vertically in relation to the saw and the filing members engage theteeth accordingly.l

The lower end of the member 6 of the filingcarriage is supported in its travel at its lower end by means of the horizontal guide 19, fixed to the frame below and parallel with the bar 3 andserving to resist the lateral pressure of the lower portion of the carriage.

The arms ofthe frame A are slotted, as at 20. In these slots are the screws 2l, on which the lower edge of the saw is adj ustably supported, or said edge may rest upon vplates 25, carried by the screws, as shown inrFig. 2.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is

l.V A device for ling and sharpening saws consisting in the combination of a frame adaptedto be rigidly secured to a support, a horizontal guide-bar against which the side portion of the saw is to be held, a filing-carriage straddling said saw and reciprocable alongsaid guide and having oppositely-rotatable filing members adapted to engage the teeth of the saw, and a bar below the guide, parallel therewith and serving as a lateral support for the lower portion of the carriage.

2. A device for filing saws, consisting in the combination of `a stationary frame having guides against which thesaw is adapted to be held, a filing-carriage movable longitudinally of said frame, filingmembers adapted to engage thel teeth ofthe saw and a chain-andsprocket mechanism including sprockets on the outer ends of the ling members, a sprocket disposed in a plane below and between said rst-named sprockets and a chain passing around both sets of sprockets by which said members are rotated.

3. A device for ling saws, consisting in the combination of a stationary frame, having a horizontal guide-bar against whichthe saw is IIOO adapted to be held, a filing-carriage reciprocable along and held to said guide, filing members adapted to engage the saw-teeth, and a chain-and-sprocket mechanism by which said members are rotated in opposite directions,said mechanism includinga main powerwheel journaled in the lower portion and in the central vertical plane of the carriage, wheels fixed to the outer ends of the filing members, and an endless flexible connection passing around the power -wheel and the wheels on the filing members.

4. A device for filingsaws, consisting in combination of a frame, a horizontal bar thereon, a longitudinal groove in said bar, a carriage straddling said bar, means upon the carriage engaging said groove, a second bar below and parallel with the grooved bar and serving as a lateral support for the forked portion of the carriage, independently-rotatable le members having helical abrading-surfaces, sprocket-Wheels upon opposite sides of the carriage, other sprocketwheels upon the shafts of said file members and a chain passing around and over said sprockets.

5. A device for filing saws, consisting in combination of a frame, a horizontal guide-bar thereon, having a longitudinal groove, a plate having a projection engaging said groove and slidable therein, a carriage supported on and movable with said plate and vertically adjustable in relation thereto, a bar below the guide-bar, parallel therewith and serving as a lateral support for the lower portion of the carriage, rotatable iile members, and chainand-sprocket mechanism by which said members are driven.

In witness whereof we have hereunto set our hands.

JOHN I-I. L. FOLKERS. GEORGE A. W. FOLKERS. 7Witnesses:

S. I-I. NoURsE, JEssIE C. BRoDIE. 

